基于单片机智能火灾报警系统().doc

本科毕业设计 题　　目 基于单片机的智能火灾报警系统 学生姓名　 专业名称　 电子电气工程学院2011级通信工程 指导教师　 2015 年 5 月 10 日 摘要 伴随着时代不断的进步，人们越来越多的使用电子类设备，无论是家庭还是工厂使用的电器都越来越多。但是随之而来的是因为电器的不当使用所引起的火灾也非常之多。我们的国家每年因为所用电器造成的火灾而损失很多的利益。火灾不仅带来的物品财产上的损失，而且带给了我们失去亲人的悲痛。所以针对这种情况我们很有必要设计出一种火灾报警系统，减少火灾的发生，并是我们在火灾中受到的经济损失和人员伤亡达到最小。目前我们国家有非常多的人也设计出了很多的火灾报警系统，但是大部分的火灾报警系统都是适用于大型的工厂、公司而并不适用于家庭、宿舍等小的环境之中。所以研制一款针对于家庭、宿舍等小环境研制出一款火灾报警系统是非常重要的。并且本次设计也言简意赅、实用性高。所以针对小的环境之中的火灾报警系统本文设计了一种火灾报警器。该系统设计核心为MCS-51单片机和MQ-2半导体气体传感器 Abstract Along with?the progress of times,?more and more people?use?electronic equipment,?whether the family or?the factory use?electrical appliances are?more and more.?It?is?because of?the improper use of?electrical appliances?caused by?fire?is also very much.?Our country?each year because of?the use of electric?fire caused by the?loss of?a lot of interests.?Fire not only?broughtthe?goods?property losses,?but also?brought us?the grief of losing loved ones.?So?in this case?it is necessary for us?to design a?fire alarm system,?reduce the fire,?and?we are?in the firecasualties and economic losses?to?the minimum.?At present,?our country has?so many peoplehave?designed a lot of?fire alarm system,?but most of the?fire alarm system?is?applicable to large?factories,?companies?and?is not?suitable for families,?dormitories and other?smallenvironment.?So the development of?a?needle?is very important for?families,?dormitories and other?small environment?developed a?fire alarm system.?And?this design?is?concise and comprehensive,?highly practical.?So for the?small?environment?of the fire alarm system?this paper designed a?fire alarm.?The core of the system design?for the MCS-51 MCU?and MQ-2chip?semiconductor gas?smoke sensor,?we adopt STC89C52 chip,?the fire alarm?circuit?in the system including the?smoke?signal acquisition?circuit,?preamplifier circuit,A/D conversion circuit , protection circuit?main?circuit.?